Fink's conjecture on ample numbers avoiding the first primes
Fink's conjecture on ample numbers avoiding the first primes
Let denote the recursive divisor function, and call a positive integer ample when . Let be the primes in increasing order. Fink's conjecture. For every positive integer , there exists an ample number not divisible by any of . This parallels the corresponding known property of abundant numbers, while odd ample numbers and examples avoiding the first prime have been found; the conjecture remains open.
Sources & referencesView supporting material
Primary source
Thomas Fink, “Recursively abundant and recursively perfect numbers”, arXiv:2008.10398 (2020).
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